"Henry Kolesnik" wrote in
message
. net...
I got a couple of the subject tubes which are supposed to
be "glow modulator tubes". Best I can determine is that
the light output will vary with current but I can't find
data sheet googling. If anyone has pinout and/or data I'd
sure like to see it. I think it might be a mid 1960s item
as my 1957 Sylvania manual doesn't show it.
thanks

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73
Hank WD5JFR
Google is your friend. See:
http://www.radiomuseum.org/tubes/tube_r1131c.html for a
little information. Unfortunately they require a membership
fee to download the datasheet illustrated.
Evidently these tubes were orginally used for early
facsimile machines (the sort used to send newspaper wire
photos) but the search shows it was also used extensively in
vision research.
Perhaps someone knows of a better source for the
datasheet.


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Richard Knoppow
Los Angeles, CA, USA